To those who study her, Nature reveals herself as extraordinarily fertile and ingenious in devising means, but she has no ends which the human mind has been able to discover or comprehend.

Science has always promised two things not necessarily related; an increase first in our powers, second in our happiness or wisdom, and we have come to realize that it is the first and less important of the two promises which it has kept most abundantly.

Being the inventor of sex would seem to be a sufficient distinction for a creature just barely large enough to be seen by the naked eye.

Custom has furnished the only basis which ethics have ever had.

As machines get to be more and more like men, men will come to be more like machines.

Logic is the art of going wrong with confidence.

If we are deprived of hope as well as fear, we are compensated by being given an almost endless patience for enduring or simply for waiting.